{"name":"Powder","publisher":"DubbleBlack","description":"Powder Evidence is a digital commerce-evidence service available pay-as-you-go for $0.10 USD per evidence request through ZeroClick/x402. No subscription or prepaid plan purchase is required. Powder returns commerce evidence, provenance, coverage, an Evidence Score, and limitations. Evidence starts at the first legitimate observable signal; no universal count or score threshold determines availability. The calling agent decides whether the evidence is sufficient for its task; Powder does not choose a recommendation for the caller.","url":"https://data.dubbleblack.com","documentationUrl":"https://data.dubbleblack.com/integration-guide","capabilities":["evidence availability","typed evidence observations","coverage and limitations","explainable Evidence Score"],"discovery":{"llms":"https://data.dubbleblack.com/llms.txt","capabilities":"https://data.dubbleblack.com/capabilities","openapi":"https://data.dubbleblack.com/openapi.json","integrationGuide":"https://data.dubbleblack.com/integration-guide"},"api":{"openapi":"https://data.dubbleblack.com/openapi.json","endpoint":"https://agents.dubbleblack.com/api/agent/evidence","method":"POST","v2Preview":{"endpoint":"https://agents.dubbleblack.com/api/agent/evidence/v2","currentPaidDefault":false,"price":"$0.10/request via x402/Base USDC when switched"}},"capabilityManifest":"https://data.dubbleblack.com/capabilities","payment":{"protocol":"x402","priceUsd":"0.10","network":"Base","asset":"USDC"},"mcp":{"transport":"streamable-http","endpoint":"https://agents.dubbleblack.com/mcp","freeOperations":["initialize","tools/list"],"paidTool":"get_recommendation_evidence","paidToolDescription":"Canonical Evidence Engine V2 interface; natural-language query, optional vertical, V2 evidence/coverage/provenance response. Explicit two-subject text comparisons return independently attributed evidence without a winner. Singleton brands compatibility is supported; budgets and include_insufficient_evidence are unsupported.","previewTool":"get_evidence_v2","previewToolCurrentPaidDefault":false,"entitlement":"ZeroClick forwarded signature and allowance verification","preparedLocally":true}}